# CVE-2025-53783: Microsoft Teams Remote Code Execution Vulnerability

> An unauthorized attacker can execute arbitrary code remotely via a heap-based buffer overflow in Microsoft Teams.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Aug 2025
- **Updated:** 13 Feb 2026
- **Also known as:** GHSA-56v2-hh65-7486

## What is CVE-2025-53783?

CVE-2025-53783 is a high-severity memory corruption vulnerability in Microsoft Teams for Android, published on 12 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Heap-based buffer overflow in Microsoft Teams allows an unauthorized attacker to execute code over a network.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2025-53783?

It affects 5 products.


Products: Microsoft Dynamics 365 Guides, Microsoft Dynamics 365 Remote Assist, Microsoft Teams, Microsoft Teams Panels, Microsoft Teams Phones.

## How do I fix CVE-2025-53783?

No fix has been published for CVE-2025-53783 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-53783 being exploited?

There is no known exploitation of CVE-2025-53783 in the wild and no public exploit code.

Public exploit code:

- Automated remediation of CVE-2025-53783 (Teams RCE) using PowerShell (github_poc): https://github.com/ksgassama-lab/MSTeams---Vulnerability---Remediation

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-53783 and fix it if it is affected.

What it is: CVE-2025-53783 is a high-severity memory corruption vulnerability in Microsoft Teams for Android, published on 12 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-53783 in the wild and no public exploit code.

Affected product: Microsoft Teams for Android. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-53783/ (Markdown: https://insights.sbomify.com/CVE-2025-53783/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53783
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53783
- OSV: https://osv.dev/vulnerability/CVE-2025-53783

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-53783/
Summaries are generated and may contain mistakes; the official description above is the record.